My favorite part of tower defense games is that 30 seconds between waves. Some people like to use the time to upgrade their units, but I like to use it to take a breather from the game and do something in the real world. Like make out with a supermodel, or maybe go online and buy a new yacht.

the key is to well place archer's so they rank up kill more and cost less.....so that later in like levels 2 you can buy a ninja..... get some kills plus archers.. then dragons the rest of the game. Its a strategic game.

hey! i found a bug in this game that make me have NaN money which is infinity.
first, buy any objects.
then, beat the first level.
but before you kill the boss, you press any object that you bought and ignore it.
when you are in the next level, sell that object (the information of that object will not go unless you close it or sell it)
after you sold your object, you realize you have NaN money!!!
HaHa!! Dragonsssssssss!!!

I agree with Wheelnut, the game is quite easy. It's not a bad game, it definitely has potential for improvement in later versions. All-in-all what can one say about tower defense games now-a-days, "Been there, done that."